Wow nice setup! Ive got some questions and excuse my ignorance. Im going to update my stereo and want to get a new Pioneer head unit, 6x9's in the front doors, 6.5's in the rear doors, 3.5's in the dash and single 12 inch sub. My first question is if you have a 4 channel amp with 7 speakers what do the other 3 speakers run off? My second question is if i have a amp that runs 250 W RMS X 2 @ 2 OHMS should i bridge it to a 4 OHM 750 W RMS sub? Thanks for any help!